Device for driving anchoring members containing a cartridge magazine

ABSTRACT

A device for driving anchoring members is formed of a casing containing a barrel axially movable within the casing and having an axially extending bore. A grip member is secured to the casing and forms a duct communicating with a cartridge chamber in the rear end of the barrel. A cartridge magazine is positioned within the duct and means are arranged within the casing and the grip member for moving cartridges in the magazine into alignment with the cartridge chamber in the end of the barrel. By moving the barrel axially rearwardly the cartridges are loaded into the cartridge chamber.

United States Patent [72] Inventors Hans-Dieter Seghezzi Vaduz, Mittelfeld, Liechtenstein; Herbert Rangger, Frastanz, I-Ieirnat, Austria [21] Appl. No. 750,817

[22] Filed Aug. 7, 1968 [45] Patented Feb. 23, 1971 [73] Assignee Hilti Aktiengesellschaft Schaan, Liechtenstein [32] Priority Aug. 11, 1967, Jan. 9, 1968 [33] Germany [31] P 16 03 841.8 and P 16 03 849.6

[54] DEVICE FOR DRIVING AN CI-IORING MEMBERS CONTAINING A CARTRIDGE MAGAZINE Primary ExaminerGranville Y. Custer, Jr. A ttorney- McGlew and Toren ABSTRACT: A device for driving anchoring members is formed of a casing containing a barrel axially movable within the casing and having an axially extending bore. A grip member is secured to the casing and forms a duct communicating with a cartridge chamber in the rear end of the barrel. A cartridge magazine is positioned within the duct and means 15 Claims Drawing Figs are arranged within the casing and the grip member for mov- [52] U.S.Cl 227/ ing cartridges in the magazine into alignment with the car- [51] Bc 1/14 tridge chamber in the end of the barrel. By moving the barrel Field of Search 227/8, 9, axially rearwardly the cartridges are loaded into the cartridge l0, l1 chamber.

2 7a 5a 7 7b 5 8 37 13 16 15 i4 17 12 1 11 1 //F/1 w I TZ T -Z1Q\\\\\\\\\\\ &\\\ I 34 34b 4- 3 H 10 8 35 34c PATENIEO EB231 3.565 313 SHEET 2 UF 3 INvENTUPS nmsmerea SFGHCZZI HERBERT RMeeEF.

TM )W VWWM PATENTEDFEa23|2n 3,565,313

SHEET 3 OF 3 INVE NTORS HHNS' IETER 550/152 HERBERT RHNG6R '81 7 y a nrrokufiys lDlEVlKIE FOR DRIVING ANCHORING MEMBERS CONTAWING A csarnmcn MAGAZINE SUMMARY OF THE INVENTION The present invention is directed to a device for driving anchoring means into a receiving material, and more particularly, it is concerned with a device having a casing containing a barrel and a member secured to the casing and arranged to receive a cartridge magazine for supplying cartridges into a chamber in the barrel. Further, the invention is concerned with means for moving the cartridge magazine within a passageway in the member for positioning cartridges in alignment with the cartridge chamber in the barrel.

In devices for driving anchoring members into a receiving material, after the anchoring member has been driven into place, it is necessary to reload the device with a new anchoring member and a new cartridge. This loading operation requires considerable time, and this is especially true in devices of known types, which due to their design, present difficulties in inserting new cartridges, particularly in cold weather when the operator wears gloves.

The primary object of the present invention is to provide a device which does not need to be reloaded with a new cartridge after each anchoring member has been inserted, instead a cartridge magazine is positionedwithin a passageway in the device, extending generally perpendicularly to the axis of the bore through the barrel device, with the magazine being moved after the device has been fired to position a new cartridge for insertion into a cartridge chamber.

Another object of the invention to secure a grip, such as a pistol grip, to a casing containing a barrel with the cartridge magazine positioned within the grip and arranged to position cartridges in alignment with the rear or cartridge chamber end of the barrel.

Still another object of the invention is to provide a barrel, axially movable through the casing, whereby after the cartridge is in position the barrel can be moved rearwardly for loading the cartridge into the cartridge chamber.

Moreover, another object of the invention is to provide lever means within the grip for feeding the cartridge magazine into position behind the barrel.

Still another object of the invention is to provide means for locking the firing pin during the loading operation and for releasing the firing pin to explode the charge in the cartridge and drive the anchoring member into the receiving material.

Yet another object of the invention is to provide a magazine for positively engaging the bottoms of the cartridges and for cooperating with the means within the grip for disposing the cartridges in alignment with the cartridge chamber in the barrel.

A still further object of the invention is to provide a device for driving anchoring members which is simple in construction and operation and affords a space saving design for the means utilized in feeding cartridges into position with the barrel.

Further, another object of the invention is to provide an arrangement of parts wherein the axial movement of the barrel is transformed into a feeding movement of the magazine for properly positioning cartridges within the casing. Due to this arrangement spent cartridges are displaced from the cartridge chamber and the movement of the barrel assists in properly locating the next cartridge in position for insertion into the cartridge chamber.

Therefore, in the present invention the device for inserting anchoring members has the appearance of a hand gun with a pistol grip. The device is formed by a casing or housing containing a barrel having an axially extending bore with the barrel axially movable through the casing. At the forward end of the casing a muzzle member is aligned with and in contact with the barrel and is arranged to move rearwardly through the casing when it is depressed against the material into which the anchoring member is to be driven. Located in the opposite end of the barrel from the muzzle member is a cartridge chamber.

Near its end, a grip member extends from the casing and is disposed generally normal to the axis of the barrel. Within the grip member a duct or=passageway is provided communicating at its upper end with a space within the casing at the rear end of the barrel. A cartridge magazine is mounted within the passageway and pawl and lever means mounted within the grip are arranged to move the magazine, each time the device is fired, so that a new cartridge is aligned with the cartridge chamber in the end of the barrel.

In addition to the means'for moving the cartridge magazine, guides are provided within the casing for holding the magazine in position as the cartridges are delivered into the cartridge chamber. The cartridges are secured .within the magazine at their bottom ends with the remainder of the cartridge casing free to fit Within the cartridge chamber. Accordingly, it is advantageous to provide the cartridges with a reinforced bottom and to extend the reinforcement up from the bottom to the portion of the casing extending into the cartridge chamber. In this way stoppages caused by broken cartridge cases can be prevented.

After a cartridge has been exploded it can be removed from the cartridge chamber by means of the magazine or, an ejector can be provided on the end of a hammer piston slidably positionable through the barrel for displacing the spent cartridges from the chamber.

According to the invention the cartridges are secured in a positive manner within the magazine. The magazine consists of a pair of edge strips which are guided within the casing with openings in a web extending between the edge strips for receiving the cartridges. In addition, an opening or recess is situated between adjacent cartridge openings for engagement by the means used to move the magazine relative to the cartridge chamber. Preferably the cartridge magazine is formed of a plastic material in a striplike configuration with the cartridges extending from the face orweb of the strip.

The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated and described preferred embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. I is a side view, partly in section, of a device for driving anchoring members embodying the present invention;

FIG. 2 is a partial top view, partly in section, of the device shown in FIG. 1;

FIG. 3 is a sectional side view of a device similar to the one shown in FIG. I incorporating another embodiment of the present invention; I

FIG. 4 is a partial top view of the device shown in FIG. I; and

FIG. 5 is a partial perspective view of a cartridge support member as shown in FIGS. 1, 2 and 3.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS- In the following description the muzzle end of the device is also referred to as the forward or front end while the opposite end of the device is characterized as its rear or back end.

In FIG. 1 the device for driving anchoring members is formed of a casing I containing an insert 2 at the muzzle end of the device secured by a ball 4 and a spring 3 within the easing. A barrel 5 having an axially extending bore 50 is positioned within and is axially movable with relation to the easing. Extending from the forward end of the barrel is muzzle member 6 arranged for axial movement through the insert 2. Located within the barrel 5 is a hammer piston 7 having its front end 7a movably supported within the opening or bore through the muzzle member 6. The rearward end 7b of the hammer piston 7 is enlarged and has an annular surface in sliding engagement with the surface of the barrel forming the bore 50. A cartridge chamber 8 is formed in the rear end of the barrel 5 in alignment and communicating with the bore 5a. Extending rearwardly from the hammer piston is an ejector member 70, arranged to extend into the cartridge chamber when the hammer piston is displaced to the full extent in the rearward or cartridge chamber direction.

At the forward end of the casing 1 a rocking lever 9 is pivotally mounted on a pin 10 and is held in the position shown in FIG. 1 by the spring 11. The lever 9 extends upwardly through a slot in the barrel 5 into the bore 5a. Within the barrel the lever is located in the path of travel of the enlarged portion of the hammer piston 7b.

In the rearward portion of the casing behind the cartridge chamber of the barrel is a breech block 12 which bears against the back end of the casing. Disposed about the forward end of the breech block 12 is a part 13 in contact with the inner surface of the casing 1. Between the rear end of the part 13 and the back end of the breech block 12, an annular open space is provided about the breech block containing a spring 14 encircling the breech block. At its rearward end the spring bears against a shoulder formed by breech block 12 and at its forward end it contacts the rear end of the part 13 and holds it in position. As shown in FIG. 2, a projection 13a extends from the front end of the part 13 into contact with the rear end of the barrel 5. I

As viewed in FIG. 1 an oval cavity 38 extends vertically through the breech block 12 and a latch 15 is secured at its upper end within the part 13 and extends downwardly through the cavity 38 passing again through the part 13 at its lower end. A recess 15a is provided in the upper end of the latch 15 and contains a spring 16 which holds the latch in position. At the lower end of the latch 15 an end piece 15b extends downwardly below the lower surface of the part 13. Disposed within the breech block 12 is a firing pin 17 extending in parallel relationship with the axis of the barrel. At its forward end the firing pin fits within an opening in the front end of the breech block and passes rearwardly through an opening in the latch 15, through the oval cavity 38 and at its rear end is seated within a bearing 19 abutting against the forward end of a spring 18. The spring 18 is located within the back end of the breech block and is supported against the end of the casing l.

As illustrated in FIG. 1, a pistollike grip 20 is secured to and extends downwardly from the casing 1 and is disposed generally perpendicularly to the main axis of the barrel. At the juncture of the grip 20 and the barrel 5 a lever 22 is pivotally mounted on a pin 21. A lever 23, pivotally mounted on a pin 24 within the grip 20, is provided with a pair of arms 23a, 23b extending in opposite directions from the pin 24. The upper surface of the arm 23a bears against the lower surface of the rear portion of the lever 22 and a spring 25 assures positive contact between the lever arm 23a and the lever 22. At the end of the other lever arm 23b, remote from the pin 24, another pin 26 is located for pivotally mounting a pawl 27 which extends downwardly from the lever arm 23b. A spring 28 is secured to the pin 26 and holds the lever 27 in the position shown in FIG. 1 with a projection 27a extending laterally from the pawl 27 for holding a cartridge magazine in position by engagement within its groove 30b.

Within the grip 20 a duct 29 is arranged perpendicularly to the axis of the barrel in the casing l and it extends between an opening in the lower end of the grip and the rear end of the barrel 5, see FIG. 1. The cartridge magazine 30 is fitted within this duct and extends upwardly to the space between the breech block 12 and the cartridge chamber 8 of the barrel. The cartridge magazine 30 is formed of a pair of side strips and a web with openings 30a provided in the web to receive, in positive engagement, the bottom portions 310 of the cartridges 31. In FIG. 1 only a few of the cartridges 31 are shown in the magazine, however, it will be appreciated that the cartridges extend for the full length of the magazine. Disposed between the openings 300 are the openings or grooves 30b into which the projection 27a of the pawl 27 fits.

On the forward side of the grip, that is in the surface facing in the firing direction, a trigger 32 is mounted on the pin 21. In the back portion of the grip a bell crank lever 34 is pivotally mounted on a pin 35 having a first arm 34a extending downwardly within the grip and a second arm 34b extending rearwardly in generally parallel relationship with the axis of the barrel. A connector pin 33 is located within the grip and extends between the lower rear surface 321: of the trigger 32 and the forward lower surface of the first arm 34a of the lever 34. A spring 36 is supported on the rearward end of the second arm 34b of the lever 34 for holding the lever in its represented position. A projection 340 is located on the upper surface of the second lever arm 34b and is arranged to cooperate with the end piece 15b of the latch 15, shown in its diflerent positions in FIG. 1 by full lines and dashed lines, for operating the firing pin 17 of the device.

At the top of the casing 1 aligned above the duct 29 through the grip 20 is an opening 37 for the removal of expended cartridges 31 and the magazine 30.

In FIG. 2 a top view is provided of the rear portion of the barrel 5 containing the cartridge chamber 8 with the breech block 12 spaced rearwardly from the end of the barrel and with a cartridge 31 secured in the magazine 30 aligned for insertion into the cartridge chamber 8. The breech block 12 is provided with a pad 12a which bears against the base of the cartridge within the magazine 30 and, further, lugs 12b extend forwardly from the breech block 12 and provide means for guiding the magazine upwardly through the casing. Within the breech block 12 the oval shape of the cavity 38 can be noted with the latch 15 extending through the cavity perpendicularly to the axis of the barrel and the firing pin 17 extending through the cavity and also through the latch 15 in parallel relationship with the axis of the barrel. The opening 37 shown in the top of the casing in FIG. 1 also extends downwardly along the side of the casing as shown in FIG. 2.

In operating the device shown in the drawing an anchoring member such as a stud or a bolt, not shown, is inserted through the muzzle member 6 into the barrel of the device. At the same time a cartridge 31 is supported by the magazine 30 in alignment with the cartridge chamber 8 at the rear end of the barrel 5. When the forward end of the device or gun is pressed against the material into which the anchoring member is to be driven, the muzzle member 6 is depressed into the casing and the barrel, in turn, rides rearwardly and the first cartridge 31 is positioned within the cartridge chamber 8. As the barrel is moved in the direction opposite the firing direction it forces the projection 13a and, in turn, part 13 to the rear against the force of the spring 14. The movement of part 13 causes the latch 15 to ride rearwardly within the cavity 38 urging the firing pin 17 in the same direction against the action of the spring 18. In its displaced position the end piece 15b of the latch 15 assumes the position shown in dashed lines in FIG. 1. The device is now ready to be fired for propelling the anchoring member into the receiving material.

When the trigger 32 is squeezed it pivots about pin 21 and its lower surface 32a urges the connector pin 33 in the rearward direction against the lower surface of the first arm 34a and causes the bell crank lever 34 to rotate in a counterclockwise direction about the pin 35 with its second arm 34b rotating upwardly. As the second arm rotates its projection 34c contacts the end piece 15b of the latch and lifts the latch against the force of the spring 16 and releases the firing pin 17. When the firing pin is released the spring 18, which has been compressed, drives it forwardly against the bottom of the cartridge within the cartridge chamber causing the cartridge to explode and driving the hammer piston toward the muzzle of the barrel. The forward end of the hammer piston drives the anchoring member out of the muzzle member 6 and into the receiving material.

After the device has been fired the enlarged portion 7b of the hammer piston 7 is located adjacent the rocking lever 9 which projects into the bore 5a of the barrel. By manipulating the muzzle member 6, that is by pulling it axially in the firing direction, the ball 4 is displaced against the spring 3 releasing the insert 2 from the casing l and the insert and the barrel move in the firing direction along with the muzzle member. Because the rocking lever Q is secured to the case, it does not move as the barrel is pulled in the firing direction and since the lever extends through the slot into the bore 5a of the barrel in contact with the enlarged portion 7b of the hammer piston, the hammer piston is held against movement while the barrel is pulled forwardly with the result that the hammer piston is displaced to the rearward end of the barrel to the position illustrated in FIG. 1. After the muzzle member, insert and barrel are pulled out of the casingto the full extent for positioning the hammer at the rearward end of the bore, they are reinserted into the casing and again assume the position shown in FIG. I. During the rearward'movement of the hammer piston its ejector pin 7c displaces the spent cartridge from the cartridge chamber 8 in the event the cartridge has not been removed by being returned within the magazine 30.

During the forward movement of the barrel, the lever 22 rides upwardly due to the action of the spring 25 transferred through the lever arm 23a which causes the lever 22 to be disposed in the path of motion of the barrel. As the lever arm 23a moves upwardly pivoting about the pin 24, the opposite end of the lever 24b pivots downwardly and the pawl 27 secured to it is disengaged from one of the grooves 30b and moves downwardly so that the projection 27a is disposed opposite the next lower groove 30b of the magazine. After its downward movement the spring 28 urges the projection 27a of the pawl 27 into engagement with the next groove 30b.

When the barrel is returned to the position shown in FIG. 1 the lever 22 is forced downwardly out of the path of travel of the barrel and causes the lever 23 to pivot about its pin 24 with its lever arm 23b and the pawl 27 attached to it moving upwardly. The upward movement translated from the displacement of the lever 22 from the path of the barrel causes the cartridge magazine 30 to move upwardly through the duct 29 so that the next cartridge 31 is aligned behind the cartridge chamber 8 in the adjacent end of the barrel.

By repeating the operation described above, as the muzzle member is forced rearwardly into the casing, the barrel slides toward the rear of the casing and its cartridge chamber fits over another cartridge and the device is ready for a new firing cycle.

The device for inserting anchoring members shown in FIG.

3 differs from the one shown in FIG. 1 only to the extent that it does not contain a hammer piston 7. Further, since no hammer piston is contained within the barrel, the rocking lever 9 and its associated parts are no longer required. The remaining parts of the device are the same as those described in the embodiment shown in FIG. I and therefore have been given the same reference numerals. Concerning the method of operation of the device shown in FIG. 3, its operation is basically the same as described above however, the explosive gases released within the cartridge are directed against the stud 10b and drive it through the bore 5a and the muzzle member 6 into the receiving material. After a firing cycle is completed, a new bolt or anchoring member 100 is inserted into the barrel and is positioned adjacent the cartridge chamber by means of a hammer, not shown. Preferably the spent cartridge cases are removed from the device within the magazine which holds the bottom part of the cartridges in positive engagement.

When the device is utilized without a hammer piston in addition to the advantage that the loading of individual cartridges is avoided, it is also possible to load units comprising both the cartridge and the anchoring member into the cartridge chamber in the barrel.

In the devices shown in FIGS. 1 and 3 the use of caseless cartridges is possible after corresponding adaptation of the device and the cartridge magazine has been made.

I claim:

1. An explosively actuated device for driving anchoring members into a receiving material comprising a casing having a forward end facing in the firing direction of the device and a rearward end disposed in the opposite direction, a barrel located within said casing and having an axially extending bore therethrough, said barrel being axially displaceable within said casing, said barrel having a forward end facing in the firing direction of the device and a rearward end forming a cartridge chamber which is in communication with the rearward end of the bore within said barrel, a pistollike grip member secured to the rearward end of said casing and extending generally perpendicularly to the axial direction of said barrel, said grip member forming a duct extending generally perpendicularly to the axial direction of said barrel and said duct arranged in communication with the cartridge chamber end of said barrel, said duct arranged to receive a cartridge support member containing a plurality of cartridges in axially arranged cartridge positions, means cooperating with said barrel and duct for effecting stepwise movement of the cartridge support member for positioning the cartridges in the serially arranged cartridge positions in axial alignment with the cartridge chamber in said barrel so that by displacing said barrel within said casing in the rearward direction the cartridges are positioned within the cartridge chamber, and triggering means disposed within said pistol grip'for actuating the firing of the cartridges positioned within the cartridge chamber.

2. A device, as set forth in claim 1, wherein a muzzle member is mounted at the forward end of said casing in axial alignment with said barrel and-forming a continuation of the bore through said barrel, said muzzle being axially displaceable with said barrel relative to said casing, and an insert member releasably secured to the forward end of said casing and disposed concentrically about said muzzle member, whereby said muzzle member is axially movable in the rearward direction with respect to said insert member and by depressing said muzzle member into said casing said barrel is displaced rearwardly therein, and when said insert is released from said casing said muzzle member insert and barrel can be displaced in the forward direction of the device outwardly from said casing.

3. A device, as set forth in claim 2, wherein a hammer piston is positioned within the bore in said barrel and is axially movable therethrough with its forward portion displaceable into the continuation of the bore within said muzzle member for driving anchoring devices from the device, said barrel having an enlarged transverse cross section at its rearward end, said barrel having an axially extending slot formed therein which extends for a substantial portion of its length from its forward end towards its rearward end, a lever pivotally connected to said casing and extending through the slot in said barrel into the bore therein, said lever arranged to contact the enlarged transverse cross section of said hammer piston when said hammer piston is displaced forwardly with said barrel and to displace said hammer position to the rearward end of said barrel when said muzzle member insert and barrel are displaced forwardly from said casing.

4. A device, as set forth in claim 3, wherein said muzzle member has a bore smaller than the bore in said barrel, said hammer piston has a first part which has a diametrical dimension so that it fits in sliding contacting engagement with the bore in said muzzle member, and a second part of said hammer piston located rearwardly of said first part has a larger diameter than said first part with at least a portion thereof in contacting and sliding relationship with the surface of the bore through said barrel, and a portion of said second part providing the enlarged transverse cross section which is contacted by said lever when said hammer piston is displaced toward the forward end of said barrel.

6. A device, as set forth in claim 2, wherein a breech block is supported within the rearward end of said casing behind said barrel and is spaced rearwardly of the extension of said duct in said grip member into said casing, a member mounted on said breech block and movably positionable thereon in the axial direction of said barrel, spring means for urging said member toward the forward end of said casing, and means located within said breech block and axially displaceable therethrough for firing cartridges positioned within the cartridge chamber in said barrel.

7. A device, as set forth in claim 6, wherein said means for firing cartridges comprises a firing pin movably positionable through said breech block in parallel relationship with the axis of said barrel, a spring member acting at one end against said casing and at the opposite end against a rearward part of said firing pin and arranged to spring load said firing pin in preparation for the firing operation, and latch means mounted within said breech block and movably positionable therein in the direction of the axis of said barrel for lockingly engaging said firing pin in the spring loaded position.

8. A device, as set forth in claim 7, wherein said breech block has an opening extending therethrough in the general direction of said duct in said member and the opening is elongated in the axial direction of said barrel, said latch means comprises a member disposed within the opening in said breech block extending transversely of the axial direction of said barrel in the general direction of said duct, said member is displaceable within the opening'in said breech in the axial direction of said barrel, said latch member having a projection extending downwardly toward said grip member, and said latch member having an opening therethrough arranged to receive said firing pin therein whereby said firing pin in its spring loaded position is held by the surface of said latch member adjacent the opening therein so that by displacing the projection on said latch member in a direction transverse to the axis of said barrel, it releases said firing pin.

9. A device, as set forth in claim 8, wherein said triggering means comprises a trigger pivotally attached to said grip member, a lever pivotally mounted within said grip member and disposed in cooperating relationship with said trigger and with the projection on said latch member, whereby as said trigger is squeezed said lever is pivoted and displaces the projection on said latch member upwardly away from said grip member for releasing said firing pin.

10. A device as set forth in claim 9, wherein said lever is a bell crank lever having a first arm extending perpendicularly to the axis of said barrel and a second arm being disposed in parallel relationship with the axis of said barrel, and a connector pin being disposed between said trigger and said first arm for pivoting said bell crank lever as said trigger is squeezed.

11. A device as set forth in claim 10, wherein said second arm of said bell crank lever has a projection extending upwardly therefrom toward the axis of said barrel and being arranged to engage said projection on said latch member whereby as said trigger is squeezed said projection on said second arm lifts said projection on said latch for displacing said latch member and releasing said firing pin.

12. A device, as set forth in claim 1, wherein said means for effecting stepwise movement of the cartridge support member comprises a first lever member pivotally mounted in said grip member adjacent said barrel, a pin member mounted within said grip member, a second lever member mounted on said pin member at a position intermediate its ends and extending in the general direction of the axis of said barrel, said second lever member has a first lever arm extending from said pin member toward the forward end of said barrel and a second lever ann extending from said pin member toward the rearward end of said casing, a spring member mounted within said grip member for urging said first lever am of said second lever into contacting relationship with said first lever and for displacing said first lever into the path of said barrel when said barrel is displaced toward the forward end of said casing, and means secured to the end of said second lever arm of said second lever spaced from said pin member for engaging and moving said cartridge support member in a stepwise manner through said duct in said grip member into the space between the rearward end of said barrel and the forward end of said breech block.

13. A device, as set forth in claim 12, wherein said means for moving said cartridge support member comprises a pawl member pin connected to said second lever arm of said second lever, said pawl member arranged to extend downwardly from said second lever arm away from said barrel, a projection on the lower end of said pawl arranged to extend into engagement with the cartridge support member, and a spring member arranged to urge the projection on said pawl into engagement with said cartridge support member.

14. A device, as set forth in claim 13, wherein a cartridge support member movably positionable within said duct comprises a longitudinally extending flat web strip, a pair of edge strips extending along each longitudinal edge of said web strip and projecting outwardly from one side of said web strip, a plurality of openings disposed in said web strip and each of the openings arranged to receive and hold the bottom end of a cartridge, and a second opening disposed in said web strip between each pair of adjacent openings which hold the cartridges and said second openings arranged to receive the projection on said pawl for the stepwise movement of said cartridge support member 15. A device, as set forth in claim 14, wherein a pair of spaced projections are provided on the face of said breech block directed toward the cartridge chamber of said barrel and said projections extend in the direction of said duct, said projections on said breech block are arranged to form guide means for said cartridge support member as it passes through said casing. 

1. An explosively actuated device for driving anchoring members into a receiving material comprising a casing having a forward end facing in the firing direction of the device and a rearward end disposed in the opposite direction, a barrel located within said casing and having an axially extending bore therethrough, said barrel being axially displaceable within said casing, said barrel having a forward end facing in the firing direction of the device and a rearward end forming a cartridge chamber which is in communication with the rearward end of the bore within said barrel, a pistollike grip member secured to the rearward end of said casing and extending generally perpendicularly to the axial direction of said barrel, said grip member forming a duct extending generally perpendicularly to the axial direction of said barrel and said duct arranged in communication with the cartridge chamber end of said barrel, said duct arranged to receive a cartridge support member containing a plurality of cartridges in axially arranged cartridge positions, means cooperating with said barrel and duct for effecting stepwise movement of the cartridge support member for positioning the cartridges in the serially arranged cartridge positions in axial alignment with the cartridge chamber in said barrel so that by displacing said barrel within said casing in the rearward direction the cartridges are positioned within the cartridge chamber, and triggering means disposed within said pistol grip for actuating the firing of the cartridges positioned within the cartridge chamber.
 2. A device, as set forth in claim 1, wherein a muzzle member is mounted at the forward end of said casing in axial alignment with said barrEl and forming a continuation of the bore through said barrel, said muzzle being axially displaceable with said barrel relative to said casing, and an insert member releasably secured to the forward end of said casing and disposed concentrically about said muzzle member, whereby said muzzle member is axially movable in the rearward direction with respect to said insert member and by depressing said muzzle member into said casing said barrel is displaced rearwardly therein, and when said insert is released from said casing said muzzle member insert and barrel can be displaced in the forward direction of the device outwardly from said casing.
 3. A device, as set forth in claim 2, wherein a hammer piston is positioned within the bore in said barrel and is axially movable therethrough with its forward portion displaceable into the continuation of the bore within said muzzle member for driving anchoring devices from the device, said barrel having an enlarged transverse cross section at its rearward end, said barrel having an axially extending slot formed therein which extends for a substantial portion of its length from its forward end towards its rearward end, a lever pivotally connected to said casing and extending through the slot in said barrel into the bore therein, said lever arranged to contact the enlarged transverse cross section of said hammer piston when said hammer piston is displaced forwardly with said barrel and to displace said hammer position to the rearward end of said barrel when said muzzle member insert and barrel are displaced forwardly from said casing.
 4. A device, as set forth in claim 3, wherein said muzzle member has a bore smaller than the bore in said barrel, said hammer piston has a first part which has a diametrical dimension so that it fits in sliding contacting engagement with the bore in said muzzle member, and a second part of said hammer piston located rearwardly of said first part has a larger diameter than said first part with at least a portion thereof in contacting and sliding relationship with the surface of the bore through said barrel, and a portion of said second part providing the enlarged transverse cross section which is contacted by said lever when said hammer piston is displaced toward the forward end of said barrel.
 5. A device, as set forth in claim 4, wherein an ejector member is positioned on the rearward end of said hammer piston in axial alignment with the cartridge member in said barrel and is arranged for ejecting spent cartridges from the cartridge chamber when said hammer piston is displaced to the rearward end of said barrel by said lever.
 6. A device, as set forth in claim 2, wherein a breech block is supported within the rearward end of said casing behind said barrel and is spaced rearwardly of the extension of said duct in said grip member into said casing, a member mounted on said breech block and movably positionable thereon in the axial direction of said barrel, spring means for urging said member toward the forward end of said casing, and means located within said breech block and axially displaceable therethrough for firing cartridges positioned within the cartridge chamber in said barrel.
 7. A device, as set forth in claim 6, wherein said means for firing cartridges comprises a firing pin movably positionable through said breech block in parallel relationship with the axis of said barrel, a spring member acting at one end against said casing and at the opposite end against a rearward part of said firing pin and arranged to spring load said firing pin in preparation for the firing operation, and latch means mounted within said breech block and movably positionable therein in the direction of the axis of said barrel for lockingly engaging said firing pin in the spring loaded position.
 8. A device, as set forth in claim 7, wherein said breech block has an opening extending therethrough in the general direction of said duct in said member and the opening is elongated in the axial direction oF said barrel, said latch means comprises a member disposed within the opening in said breech block extending transversely of the axial direction of said barrel in the general direction of said duct, said member is displaceable within the opening in said breech in the axial direction of said barrel, said latch member having a projection extending downwardly toward said grip member, and said latch member having an opening therethrough arranged to receive said firing pin therein whereby said firing pin in its spring loaded position is held by the surface of said latch member adjacent the opening therein so that by displacing the projection on said latch member in a direction transverse to the axis of said barrel, it releases said firing pin.
 9. A device, as set forth in claim 8, wherein said triggering means comprises a trigger pivotally attached to said grip member, a lever pivotally mounted within said grip member and disposed in cooperating relationship with said trigger and with the projection on said latch member, whereby as said trigger is squeezed said lever is pivoted and displaces the projection on said latch member upwardly away from said grip member for releasing said firing pin.
 10. A device as set forth in claim 9, wherein said lever is a bell crank lever having a first arm extending perpendicularly to the axis of said barrel and a second arm being disposed in parallel relationship with the axis of said barrel, and a connector pin being disposed between said trigger and said first arm for pivoting said bell crank lever as said trigger is squeezed.
 11. A device as set forth in claim 10, wherein said second arm of said bell crank lever has a projection extending upwardly therefrom toward the axis of said barrel and being arranged to engage said projection on said latch member whereby as said trigger is squeezed said projection on said second arm lifts said projection on said latch for displacing said latch member and releasing said firing pin.
 12. A device, as set forth in claim 1, wherein said means for effecting stepwise movement of the cartridge support member comprises a first lever member pivotally mounted in said grip member adjacent said barrel, a pin member mounted within said grip member, a second lever member mounted on said pin member at a position intermediate its ends and extending in the general direction of the axis of said barrel, said second lever member has a first lever arm extending from said pin member toward the forward end of said barrel and a second lever arm extending from said pin member toward the rearward end of said casing, a spring member mounted within said grip member for urging said first lever arm of said second lever into contacting relationship with said first lever and for displacing said first lever into the path of said barrel when said barrel is displaced toward the forward end of said casing, and means secured to the end of said second lever arm of said second lever spaced from said pin member for engaging and moving said cartridge support member in a stepwise manner through said duct in said grip member into the space between the rearward end of said barrel and the forward end of said breech block.
 13. A device, as set forth in claim 12, wherein said means for moving said cartridge support member comprises a pawl member pin connected to said second lever arm of said second lever, said pawl member arranged to extend downwardly from said second lever arm away from said barrel, a projection on the lower end of said pawl arranged to extend into engagement with the cartridge support member, and a spring member arranged to urge the projection on said pawl into engagement with said cartridge support member.
 14. A device, as set forth in claim 13, wherein a cartridge support member movably positionable within said duct comprises a longitudinally extending flat web strip, a pair of edge strips extending along each longitudinal edge of said web strip and projecting outwardly from one side of said web strip, a Plurality of openings disposed in said web strip and each of the openings arranged to receive and hold the bottom end of a cartridge, and a second opening disposed in said web strip between each pair of adjacent openings which hold the cartridges and said second openings arranged to receive the projection on said pawl for the stepwise movement of said cartridge support member.
 15. A device, as set forth in claim 14, wherein a pair of spaced projections are provided on the face of said breech block directed toward the cartridge chamber of said barrel and said projections extend in the direction of said duct, said projections on said breech block are arranged to form guide means for said cartridge support member as it passes through said casing. 